On Mon, Feb 16, 2015 at 12:07 AM, Michael Schumacher
<michael.schumacher@xxxxxxxx> wrote:
> Btw., are you sure you want to use XFS for a mail server? I made some
> tests about a year ago and found that EXT4 is by the factor 10 faster
> compared to XFS. The tests I performed were using the "maildir" style
> postfix installation that results in many thousands files in the user
> directories.
This is a recent benchmarking using Postmark which supposedly
simulates mail servers. XFS stacks up a bit better than ext4.
http://www.phoronix.com/scan.php?page=article&item=linux-3.19-ssd-fs&num=3
A neat trick for big busy mail servers that comes up on linux-raid@
and the XFS list from time to time, is using md linear/concat to put
together the physical drives into a single logical block device, and
then format it XFS. XFS will create multiple AG's across all of those
devices, and do parallel writes across all of them. It's often quite a
bit better performing than raid0 specifically because of the many
thousands of small files in many directories workload.
--
Chris Murphy
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